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Over 200 specimens of assorted minerals from throughout Colorado, ranging from sedimentary deposits to ore bodies to pegmatites.  Colorado is one of the mineralogically diverse states in the U.S., and has always been a favorite among collectors around the world.

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No. CO712B01 - $ 2400.00 (=~ £ 1633.68)

Tellurium

Locality: El Moro Mine, Boulder County, Colorado

Specimen Size: 6.5 x 6.2 x 5.7 cm (small cabinet)


ex.  Jack Byron

Tellurium is not common to find isolated in nature, and arguably the finest crystallized examples are those from the Emperor Mine in Fiji. This piece is from Boulder County – the site of the first Tellurium discovery in Colorado, and is an impressive specimen and certainly rarely seen on the market. It features beautiful bright silvery-white or “tin-white” metallic Native Tellurium on matrix from this lesser obscure mine in Boulder County. The Tellurium itself is completely crystallized (see micro photos) with notable striations and top luster, and make no mistake, there is a lot of Tellurium present on the piece, especially compared to most other specimens of this mineral that I’ve seen.   It should be noted that this specimen was not "roasted" in a coal fire, like so many were back in the day when they were discovered originally to contain native Gold, and this piece truly does contain the species Hessite and most likely Calaverite and / or Krennerite.  The piece came to me from the Jack Byron collection and Jack’s collection number {8593} is painted on the bottom of the specimen which matches the old collection label that accompanies the piece. To be honest, I’ve looked through all of the available literature I can find, and this mine is not mentioned as producing Native Tellurium, even in the old 1114 Bulletin or the updated version. If anybody can help me shed some light on this specimen, I would greatly appreciate the help.  

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(click on the pictures to enlarge)


No. CO712B02 - $ 1500.00 (=~ £ 1021.05)

Tellurium with Tetrahedrite

Locality: Rex Mine, Gold Hill District, Boulder County, Colorado

Specimen Size: 6.0 x 4.2 x 3.7 cm (small cabinet)


ex.  J. J. Finney and R. R. Mclellan

A classic association specimen from the famous Gold Hill District featuring several areas of beautiful bright silvery-white or “tin-white” metallic Native Tellurium with grey Tetrahedrite on matrix from this famous mine in Boulder County. I photographed the piece under the microscope to illustrate the Tellurium crystals, and they are actually crystallized and not just rough masses. Tellurium is not common to find isolated in nature, and arguably the finest crystallized examples are those from the Emperor Mine in Fiji. The piece came from the collection of J. J. Finney, who donated the piece to the Colorado School of Mines. According to the label (# 80.459), the piece was collected in 1967 by Russ McClelland.   I have been informed that this species is exceptionally rare on the market today, and very few pieces are available for purchase from any world locality.  If you’re a Colorado collector, of if you’ve ever wanted a piece of this hard to find material, do not miss out on this affordably priced specimen from nearly 50 years ago.  It should be noted that this specimen was not "roasted" in a coal fire, like so many were back in the day when they were discovered originally to contain native Gold, and this piece truly does contain the species Hessite and most likely Calaverite and / or Krennerite.

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(click on the pictures to enlarge)


No. CO712B03 - $ 125.00 (=~ £ 85.09)

Galena

Locality: White Raven Mine, Ward District, Boulder County, Colorado

Specimen Size: 6.6 x 5.3 x 3.1 cm (small cabinet)

A beautiful and sculptural display specimen of Galena from the famous White Raven Mine. The piece is fully crystallized all the way around, and features several “leaves” or “ribs” of Galena which are accented by tiny sharp, lustrous cubes of matte-grey Galena. The overall appearance resembles that of a flower or a head of cabbage, with the leaves opening up. A very unusual specimen for Galena to be sure, and the only one like it that I’ve seen.

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No. CO712B04 - SOLD

Coloradoite (rich sample)

Locality: #2 Rex Mine, Gold Hill District, Boulder County, Colorado

Specimen Size: 6.8 x 4.5 x 4.1 cm (small cabinet)

Boulder County is the type locality for Coloradoite, and it is certainly a favorite among telluride collectors. Good crystallized specimens are not common, and are next to impossible to find on the market, especially from Boulder County, as there are no operating mines there at the moment. This piece shows the classic “iron-grey” Coloradoite which is lying flat against the matrix. Coloradoite is exceptionally difficult to obtain in such a rich specimen, as it is often found in trace amounts. If you are a Colorado collector or if you enjoy rich samples of hard to find telluride species, be sure to pick this one up. From the Colorado School of Mines Collection (#68.56) and was collected in 1967 by Russ McClelland.

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No. CO712B05 - $ 125.00 (=~ £ 85.09)

Siderite (Mn-bearing) / Rhodochrosite (Fe-bearing)

Locality: Black Prince Mine (Paymaster-Wheelman Tunnel Occurrence), Boulder County Tungsten District, Boulder County, Colorado

Specimen Size: 3.7 x 3.3 x 3.2 cm (miniature)


ex.  Richard A. Kosnar

A rarely seen group of trigonal Siderite / Rhodochrosite crystals on matrix from Boulder County.  The typical pink color that one would expect from Rhodochrosite has been muted due to the presence of iron in the crystals.  The piece is probably closer to Siderite chemically, but I haven't had it tested to know 100%.  The crystals have good form, with sharp faces and luster, and are even slightly translucent when backlit. A great pickup for a Rhodo collector, as these pieces are almost unheard of on the market.

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(click on the pictures to enlarge)


No. CO712B06 - SOLD

Pyrite

Locality: Krakajak #1 Mine, Fourmile Creek, Sugarloaf District, Boulder County, Colorado

Specimen Size: 2.7 x 2.1 x 1.6 cm (thumbnail)
Largest Crystal: 1.6 cm

A classic full-sized thumbnail of Pyrite from the famed Krakajak Mine! My father and Hal Miller reported crystals from this mine up to 2 inches (!) in the Mineralogical Record, although I haven’t seen one that big. This particular locality was a favorite of Hal’s, as he mentioned it every time I said the word Pyrite in conversation. I’ve examined this specimen closely, and you can clearly see the pyritohedral and octahedral faces, along with thin cube faces, and what I believe to be diploid faces near the “top” of the crystals. The luster, sharpness, and definition combined with the unique habit make this a more than worthwhile display specimen of this very hard to find material.

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No. CO712B07 - SOLD

Coffinite (rare)

Locality: La Sal No. 2 Mine, Beaver Mesa, Mesa County, Colorado (TYPE LOCALITY)

Specimen Size: 1.7 x 1.2 x 0.9 cm (thumbnail)


ex.  Richard A. Kosnar

A rarely seen specimen of Coffinite from the Beaver District in Mesa County. The label states “La Sal Mine”, and I'm assuming it's from the La Sal No. 2 Mine, which is the type locality for this species. The label states that the piece was mined in 1956.   If you're a rare mineral collector, this is a great opportunity to pick up a species that is seldom available on the market.

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No. CO712B08 - SOLD

Uraninite with Proustite

Locality: 1040 Level, Radium Vein, Caribou Mine, Grande Island Mining District, Boulder County, Colorado

Specimen Size: 2.4 x 1.5 x 0.8 cm (thumbnail)


ex.  Hal Miller

If it weren’t for the label, I would have my doubts about this one, but this is a former Hal Miller specimen, and in my mind, absolute. A very hard to find association of black Uraninite with Proustite from the famous Caribou Mine! Hal Miller’s hand written collection label accompanies the piece, and states that the specimen was collected after the end of WWII in 1947.

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No. CO712B09 - SOLD

Uraninite with Proustite and Pearceite

Locality: 1040 Level, Radium Vein, Caribou Mine, Grande Island Mining District, Boulder County, Colorado

Specimen Size: 2.1 x 1.8 x 1.1 cm (thumbnail)

If it weren’t for the label, I would have my doubts about this one, but this is a former Hal Miller specimen, and in my mind, absolute. A very hard to find association of black Uraninite with Proustite and Pearceite from the famous Caribou Mine! Hal Miller’s hand written collection label accompanies the piece.

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No. CO712B10 - SOLD

Barite on Galena

Locality: White Raven Mine, Ward District, Boulder County, Colorado

Specimen Size: 4.2 x 3.7 x 1.2 cm (miniature)
Largest Crystal 4 mm

A classic specimen of the well-known Barites from the famous White Raven Mine in Boulder County. This mine produced some of the most attractive display specimens from Boulder County, including arguably the finest Barite specimens. Dozens of sharp, lustrous, chalky to porcelain white tabular crystals of Barite are accented by a handful of bright golden color Sphalerite crystals and sitting on contrasting dark grey Galena matrix. These specimens unquestionably have “dried up” over the last 20 years or so, and to find them on the market is almost impossible now. If you are a Barite collector, or if you like good crystallized Boulder County specimens, don’t miss out on this one!

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No. CO712B11 - $ 150.00 (=~ £ 102.10)

Creedite

Locality: Henderson Mine, west of Empire, Dailey District (Jones Pass District), Clear Creek County, Colorado

Specimen Size: 10.2 x 6.4 x 3.8 cm (cabinet)
Largest Crystal Group: 1.2 cm across


ex.  Brian Kosnar

Collected in 2007, these lilac colored Creedites were one of the few mineral discoveries from the Henderson Mine to actually survive and make their way OUT of the mine. The Henderson Mine is a MASSIVE commercial Molybdenum mining operation that runs 24 hours a day, and there is no time to stop to collect minerals, regardless of quality or quantity. Amazingly enough, a few miners were able to liberate some of these beautiful Creedite specimens, which must have been exposed in an area that was not slated for blasting immediately. Nonetheless, this is a very good representation of this material as it features several translucent, crystallized “balls” of beautiful soft purple Creedite sitting on host rock matrix. It is very difficult to obtain good matrix pieces of this material, especially in cabinet sized specimens. The type locality for Creedite is in Colorado, but those specimens are typically white, and not terribly attractive. Good purple Creedites are few and far between from world localities, and this one would make a great addition to any Colorado collection.

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No. CO712B12 - SOLD

Tetrahedrite with Siderite on Quartz

Locality: War Dance Mine, Central City District, Gilpin County, Colorado

Specimen Size: 5.2 x 2.7 x 1.2 cm (small cabinet)
Largest Crystal 0.7 cm


ex.  E. M. Gunnell

A beautiful Tetrahedrite specimen from the famous Central City District in Colorado. This area was the site of the first Gold rush in Colorado, and led to Central City being one of the most active communities in Colorado for nearly 40 years after the discovery of Gold. This piece comes from the collection of well-known Denver dealer and mineral collector “Mike” or “Mitch” Gunnell. By my father’s accounts, Gunnell was salty to say the least, but had impeccable taste, and amassed an impressive mineral collection of a few thousand specimens, many from Colorado. Near the end of Gunnell’s life, he started selling off his collection piece by piece, and since my father visited him on a regular basis, he was able to acquire many superb pieces over the years. This piece was purchased in 1979 from Gunnell, and since my father had just recently moved to Gilpin County, he was trying to get his hands on every good specimen from this area. My father told me that Gunnell had a good suite of Gilpin County minerals, some were the best that he had seen from the area, which included this Tetrahedrite. The piece is not only superb for Central City, but honestly would hold its own against the majority of Tetrahedrites from anywhere in Colorado. Many sharp, incredibly well-formed, modified tetrahedral crystals of Tetrahedrite are associated with light golden discs of Siderite on both sides of the piece, and are sitting on minor sugary grey-blue Quartz. Do not miss out on this extremely hard to find, superb quality specimen of this classic material.

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No. CO712B13 - $ 400.00 (=~ £ 272.28)

Britholite-(Ce) with Tornebohmite-(Ce) and Allanite-(Ce)

Locality: Jamestown Pegmatite, Jamestown District, Boulder County, Colorado

Specimen Size: 9.2 x 8.5 x 4.0 cm (small cabinet)


ex.  Richard A. Kosnar

I’ve only seen a handful of these specimens, and this piece is by far the best from the area that I know of. This specimen was personally collected by my father on April 15, 1973. It features brownish areas of the uncommon phosphate, Britholite-(Ce) associated with greenish-grey Törnebohmite-(Ce) which are surrounded by dark bands of Allanite-(Ce) and associated with unusual streaks of translucent brown Smoky Quartz and intermixed with so-called pinkish-tan “Cerite” and greyish Microcline. The specimen was analyzed by Gene Foord years ago, and in his communication with my father mentioned that “Cerite” on the piece may actually be Bastnasite. If you collect this material, don’t miss out on this specimen, as I do not know of a better one out there.

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No. CO712B14 - $ 175.00 (=~ £ 119.12)

Britholite-(Ce) with Allanite-(Ce) on Microcline

Locality: Jamestown Pegmatite, Jamestown District, Boulder County, Colorado

Specimen Size: 4.7 x 3.3 x 1.6 cm (miniature)


A rich specimen, and a great representation of this extremely hard to find material. This specimen was personally collected by my father on April 15, 1973. It features brownish areas of the uncommon phosphate, Britholite-(Ce) associated with greenish-grey Törnebohmite-(Ce) which are covered on one side by a dark band of Allanite-(Ce) with so-called pinkish-tan “Cerite” and pinkish Microcline. The specimen was analyzed by Gene Foord years ago, and in his communication with my father mentioned that “Cerite” on the piece may actually be Bastnasite. If you collect this material, don’t miss out on this specimen.

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(click on the pictures to enlarge)


No. CO712B15 - SOLD

Ferberite (nugget)

Locality: Boulder Creek, Boulder County, Colorado

Specimen Size: 7.8 x 5.0 x 4.1 cm (small cabinet)


ex.  Richard A. Kosnar

Boulder County probably produced more Ferberite than any other part of Colorado. I’ve personally handled a lot of Ferberite specimens from Bolivia, and specimens from Colorado are so incredibly different, that they are fascinating to me. This is one of the few Ferberite nuggets that I’ve seen from any locality. It is as it sounds, just a large semi-crystalline mass with quite a bit of heft to it (475 grams). The label from my dad’s collection says that the piece was collected in 1876.

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(click on the pictures to enlarge)


No. CO712B16 - SOLD

Pentlandite (Co-rich) with Violarite and Polydimite

Locality: Copper King Mine (Yeager's Mine), Gold Hill, Gold Hill District, Boulder County, Colorado

Specimen Size: 6.7 x 6.2 x 5.1 cm (small cabinet)

A hard to find specimen from this noted mine in Boulder County, Colorado. The Copper King Mine actually was more of a Nickel producer (approximately 25,000 tons over the course of its life). This piece features rich patches of golden-bronze Pentlandite (Cobalt Pentlandite) – which may actually be mixed with Pyrrhotite - associated with notable violet-grey Violarite and complex twinned crystals grey-black Polydymite on matrix. Extremely hard to find on the market, and worthwhile to anybody who is familiar with the material.

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(click on the pictures to enlarge)


No. CO712B17 - $ 250.00 (=~ £ 170.17)

Chalcopyrite

Locality: Alice Glory Hole, Alice mine, Fall River Road, Clear Creek County, Colorado

Specimen Size: 3.7 x 2.7 x 2.1 cm (miniature)


The Alice mine is one of the most classic of all the Colorado localities for Chalcopyrite. It is renowned for its superb Chalcopyrite specimens, exhibiting some of the finest twins for the species extant. The Chalcopyrites from this mine are a staple of any good Colorado mineral collection. This specimen features good sized, sharp, metallic, brassy-gold colored twinned crystals of Chalcopyrite coated by micro epitaxial cubic Galena(?), as there is already associated Sphalerite on the reverse side that looks quite different from what’s on the front of the piece. Possibly the coating could be one of the several Bismuth sulfides reported from this mine, but without testing, it’s difficult to know for certain. The specimen is nearly 100% complete, with just a minor contact on the back – both ends are crystallized! - and still displays well from the front. These specimens are almost impossible to obtain these days, and are regarded among Colorado collectors as some of the best from the state. Well worth picking up for anybody interested in these beauties.

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(click on the pictures to enlarge)


No. CO712B18 - $ 150.00 (=~ £ 102.10)

Pyrite (Cathedral Gothic faces)

Locality: Patch Mine (Glory Hole Mine), Central City District, Gilpin County, Colorado

Specimen Size: 2.5 x 1.7 x 1.6 cm (thumbnail)


ex.  Marilyn Dodge

Good Pyrites from the Patch Mine are one of my favorites, because I grew up in Gilpin County, and these specimens are incredibly iconic. This box buster thumbnail specimen comes from the collection of Marilyn Dodge via The Arkenstone. A superb near “floater” specimen with well-defined pyritohedral habit faces, showing the classic and seldom seen “Cathedral Gothic” faces that are typically most often seen from localities such as Leadville. Beautiful luster on every face combined with the artistic crystal form would make this a worthwhile addition to any collection.

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(click on the pictures to enlarge)


No. CO712B19 - SOLD

Pyrite with Quartz

Locality: War Eagle Mine, Independence District (Perigo District), Gilpin County, Colorado

Specimen Size: 7.3 x 4.6 x 3.3 cm (thumbnail)
Largest Pyrite: 7 mm


ex.  Brian Kosnar

Pyrites from Gilpin County are one of my favorites, due to the fact that I grew up near Black Hawk, and these specimens are incredibly difficult to find in such fine display specimens such as this. This particular piece is from my own personal collection, and is the best War Eagle Pyrite that I’ve seen, although I have to believe there must be better ones as crystals from this mine were reported up to half an inch. The specimen actually once belonged to Warren Prosser the noted author and geologist who worked in the San Juan Mountains of Colorado. The piece plays host to dozens of sharp, fairly lustrous, attractive, cubic crystals that are slightly modified by dodecahedra and octahedra which are associated with minor white Quartz. If you are a Pyrite collector, don’t let this one pass by, as it’s a wonderful representation for the species.

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(click on the pictures to enlarge)


No. CO712B20 - SOLD

Chalcopyrite with Quartz

Locality: Smith Mine, Black Hawk, Gilpin County, Colorado

Specimen Size: 3.3 x 3.2 x 2.1 cm (thumbnail)
Largest Chalcopyrite: 8 mm


ex.  Leigh Price

A good representative Chalcopyrite and Quartz specimen from the Smith Mine. A cluster of well-formed but oxidized tetragonal pyramids of Chalcopyrite are sitting atop a mound of sharp, lustrous, gemmy Quartz crystals and are associated with minor Tetrahedrite on the reverse side. No real damage to speak of, and extremely hard to find on the market. I had the Tetrahedrite crystals on the back of the specimen analyzed via XRD and confirmed their identity.

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(click on the pictures to enlarge)


No. CO712B21 - SOLD

Chalcopyrite

Locality: Alice Glory Hole, Alice Mine, Fall River Road, Clear Creek County, Colorado

Specimen Size: 2.2 x 1.4 x 1.3 cm (thumbnail)


ex.  Marilyn Dodge

The Alice mine is one of the most classic of all the Colorado localities for Chalcopyrite. It is renowned for its superb Chalcopyrite specimens, exhibiting some of the finest twins for the species extant. The Chalcopyrites from this mine are a staple of any good Colorado mineral collection. This beautiful thumbnail specimen features incredibly sharp, amazingly well-formed, metallic, brassy-gold colored twinned crystals of Chalcopyrite with a beautiful patina. A small gem quality Quartz crystal can be seen jutting out of the back of the piece. The quality does not get better from the Alice Mine in my experience, despite a small nick near one edge. I acquired the specimen from The Arkenstone when they were dispersing Marilyn Dodge’s collection. These specimens are almost impossible to obtain these days, and are regarded among Colorado collectors as some of the best from the state. Well worth picking up for anybody interested in these beauties.

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(click on the pictures to enlarge)


No. CO712B22 - SOLD

Barite

Locality: Stoneham, Weld County, Colorado

Specimen Size: 7.2 x 5.6 x 1.6 cm (small cabinet)

This locality has produced some of the most classic and easily recognizable Barite specimens from anywhere in the United States. The soft grey-blue color combined with the excellent quality of the crystals makes them such a well-known Colorado classic. This piece features several prismatic crystals of GEM quality to translucent grey-blue Barite in near parallel growth. Virtually every crystal is damage free. This is a great representative display specimen of this material. This piece was from the well-known discovery in 1989 when some superb specimens were found near Stoneham.

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(click on the pictures to enlarge)


No. CO712B23 - $ 250.00 (=~ £ 170.17)

Tetrahedrite

Locality: Sweet Home Mine, Mount Bross, Buckskin Gulch, Alma District, Park County, Colorado

Specimen Size: 7.1 x 6.7 x 3.2 cm (small cabinet)
Largest Crystal: 6 mm


ex.  Richard A. Kosnar

Although the Sweet Home mine is most famous for its Rhodochrosite specimens, the most significant sulfide in the mine is Tetrahedrite. This specimen (despite the fact that it was very difficult to photograph), hosts hundreds of good quality Tetrahedrite crystals measuring up to 6 mm with great luster, sharpness and a slight amount of iridescent Bornite coating a few of the Tetrahedrite faces. Associated minerals include Quartz, Galena, Pyrite and Chalcopyrite. The piece was collected by my father, Richard Kosnar, and my grandfather, Dave Bergman, in late 1977.

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(click on the pictures to enlarge)


No. CO712B24 - SOLD

Rhodochrosite on Quartz

Locality: Hedgehog Pocket, Main Stope Drift, Sweet Home Mine, Mount Bross, Buckskin Gulch, Alma District, Park County, Colorado

Specimen Size: 3.1 x 1.3 x 1.0 cm (miniature)
Largest Crystal: 1.1 cm

This piece is from one of the earlier pockets that Collector’s Edge opened at the Sweet Home Mine. This piece is a great association specimen from the mine that produced the world's finest quality Rhodochrosites. It features sharp, gemmy, translucent, reddish-pink crystals of rhombic Rhodochrosite which are beautifully and gently perched atop and between gem “needle” Quartz crystals. Great quality, aesthetics and association, as Quartz with only Rhodochrosite is not easy to find from the Sweet Home Mine, and in many people’s opinions, is the most desirable matrix for Rhodos from this mine.

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(click on the pictures to enlarge)


No. CO712B25 - SOLD

Fluorite on Quartz

Locality: Sweet Home Mine, Mount Bross, Buckskin Gulch, Alma District, Park County, Colorado

Specimen Size: 4.3 x 3.4 x 2.1 cm (miniature)
Largest Crystal: 4 mm


ex.  Richard A. Kosnar

The Sweet Home mine is famous for its Rhodochrosite specimens, but it has produced some VERY nice Fluorites as well. For those who don't know, Richard Kosnar mined the Sweet Home for a few years during the late 1970's and managed to collect some excellent Rhodo specimens. This piece features many gemmy, rich royal purple, cubic crystals of Fluorite measuring up to 4 mm with good sharpness and luster. The Fluorites sit atop a matrix comprised of Quartz “needles”, but there are minor associated sulfides as well. A great miniature Fluorite specimen from the mine that produced the world's finest quality Rhodochrosites. Despite the smaller size, this is a good quality Fluorite from the Sweet Home, and pieces from the Sweet Home mine are quickly disappearing from the market. This piece is from one of the early pockets that Rich Kosnar opened when he started mining in 1977.

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(click on the pictures to enlarge)


No. CO712B26 - SOLD

Matildite

Locality: More Cash Lode, at the base of Sullivan Mountain, Montezuma, Summit County, Colorado

Specimen Size: 2.8 x 2.2 x 1.5 cm (thumbnail)


ex.  Richard A. Kosnar

A very rarely seen specimen of Matildite from this classic locality at the base of Sullivan Mountain in Colorado. My mom and dad personally collected this specimen on September 26, 1979. It features thin matte-grey crystals of this rare Silver Bismuth sulfide on Pyrite and Quartz matrix. I photographed the crystals under the microscope to better illustrate the quality. It’s a good specimen for Colorado, and how often does one encounter a specimen of Matildite on the market?

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(click on the pictures to enlarge)


No. CO712B27 - SOLD

Matildite

Locality: More Cash Lode, at the base of Sullivan Mountain, Montezuma, Summit County, Colorado

Specimen Size: 4.6 x 3.6 x 2.9 cm (miniature)

A very rarely seen specimen of Matildite from this classic locality at the base of Sullivan Mountain in Colorado. My mom and dad personally collected this specimen on September 26, 1979. It features thin matte-grey crystals of this rare Silver Bismuth sulfide in a vug of crystallized Quartz in between golden Pyrite matrix. I photographed the crystals under the microscope to better illustrate the quality. It’s a good specimen for Colorado, and how often does one encounter a specimen of Matildite on the market?

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(click on the pictures to enlarge)


No. CO712B28 - $ 125.00 (=~ £ 85.09)

Tetrahedrite and Galena on Quartz

Locality: Sweet Home Mine, Mount Bross, Buckskin Gulch, Alma District, Park County, Colorado

Specimen Size: 6.3 x 3.2 x 2.1 cm (small cabinet)
Largest Crystal: 6 mm


ex.  Richard A. Kosnar

Although the Sweet Home mine is most famous for its Rhodochrosite specimens, the most significant sulfide in the mine is Tetrahedrite. This specimen hosts several good quality Tetrahedrite crystals measuring up to 6 mm with great luster, sharpness and a slight amount of  associated minerals include Galena and Pyrite which are sitting on a beautiful “plate” of gem quality “needle” Quartz, which was indicative of the pieces that came during this period. The piece was collected by my father, Richard Kosnar, and my grandfather, Dave Bergman, in late 1977.

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(click on the pictures to enlarge)


No. CO712B29 - $ 90.00 (=~ £ 61.26)

Fluorapatite

Locality: Sweet Home Mine, Mount Bross, Buckskin Gulch, Alma District, Park County, Colorado

Specimen Size: 3.1 x 2.1 x 1.9 cm (thumbnail)
Largest Crystal: 5 mm

The Sweet Home mine is obviously famous for its amazing Rhodochrosite specimens, but other associated colorful minerals have been found there. For those who don't know, Richard Kosnar mined the Sweet Home for a few years during the late 1970's and managed to collect some excellent non-Rhodochrosite specimens. This piece is from one of the first pockets that Rich opened when he started mining the Sweet Home with my grandfather, Dave Bergman. Apatite is rather rare in my experience from the Sweet Home, and even the pieces mined by Collector’s Edge did not produce much Apatite. This specimen features a beautiful sharp, lustrous, gemmy, bicolor (green and colorless), doubly-terminated Apatite crystal measuring 5 mm sitting on Quartz and sulfide matrix. This piece was collected in 1977 out of a very small pocket that only produced a small amount of good Apatite specimens.

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(click on the pictures to enlarge)


No. CO712B30 - SOLD

Fluorapatite

Locality: Sweet Home Mine, Mount Bross, Buckskin Gulch, Alma District, Park County, Colorado

Specimen Size: 2.3 x 1.9 x 1.1 cm (thumbnail)
Largest Crystal: 3 mm

The Sweet Home mine is obviously famous for its amazing Rhodochrosite specimens, but other associated colorful minerals have been found there. For those who don't know, Richard Kosnar mined the Sweet Home for a few years during the late 1970's and managed to collect some excellent non-Rhodochrosite specimens. This piece is from one of the first pockets that Rich opened when he started mining the Sweet Home with my grandfather, Dave Bergman. Apatite is rather rare in my experience from the Sweet Home, and even the pieces mined by Collector’s Edge did not produce much Apatite. This specimen features a few beautiful sharp, lustrous, gemmy, bicolor (green and colorless), Apatite crystals measuring up to 3 mm sitting on Quartz and sulfide matrix. This piece was collected in 1977 out of a very small pocket that only produced a small amount of good Apatite specimens.

To order this specimen click here

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